{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "548504312",
    "entityType": "User",
    "nonce": "0x624a2557edde85af652e1d276690859f994eb68e26f020c7c878c29e2824381a",
    "signature": "0xd7b882e9a137a9be60f08c5a8526986f98111673ee9e30dc56b504180dd02e716a2a2852ed1cc3e132b36511d85f020df5ed54b03987346f5971eba23cf42e041b",
    "signer": "0x76433fcfc10E04743aB4EB98660d4B47526AD243",
    "userId": "328228955"
  }
}